Chromium-63

Properties and data of the isotope ⁶³Cr.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Chromium isotopes (and general data sources).

General data

Name of the isotope:Chromium-63; Cr-63Symbol:⁶³Cr or 6324CrMass number A:63 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:39Isotopic mass:62.96134(38) u (atomic weight of Chromium-63)Nuclide mass:62.9481744 u (calculated nuclear mass without electrons)Mass excess:-36.01156 MeVMass defect:0.564392492 u (per nucleus)Nuclear binding energy:525.72821994 MeV (per nucleus)
8.34489238 MeV (average binding energy per nucleon)Separation energy:S_N = 3.18(39) MeV (first neutron)
S_P = 17.82(47) MeV (first proton)Half-life:129(2) msDecay constant λ:5.373233957829 s^-1Specific activity α:5.219092220555 × 10⁺²² Bq g^-1
1410565465014.9 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-Year of discovery:1992

Radioactive Decay

Half-life T_½ = 129(2) ms respectively 1.29 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶³Mn	100 %	10.88(36) MeV
β^- , n	⁶²Mn	?	4.45(36) MeV

Parent Nuclides

Direct parent isotope is: ⁶³V.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 39) and isobaric (same nucleon number A = 63) with Chromium-63. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 39	Isobar A = 63
21	⁶⁰Sc	⁶³Sc
22	⁶¹Ti	⁶³Ti
23	⁶²V	⁶³V
24	⁶³Cr	⁶³Cr
25	⁶⁴Mn	⁶³Mn
26	⁶⁵Fe	⁶³Fe
27	⁶⁶Co	⁶³Co
28	⁶⁷Ni	⁶³Ni
29	⁶⁸Cu	⁶³Cu
30	⁶⁹Zn	⁶³Zn
31	⁷⁰Ga	⁶³Ga
32	⁷¹Ge	⁶³Ge
33	⁷²As	⁶³As
34	⁷³Se	⁶³Se
35	⁷⁴Br
36	⁷⁵Kr
37	⁷⁶Rb
38	⁷⁷Sr
39	⁷⁸Y
40	⁷⁹Zr
42	⁸¹Mo